Insulate a Drafty Window | Cost of Interior Storm Windows ...

Plexiglass Vs. Tempered Glass - Joan Whetzel - HubPages

Aug 27, 2012 ... Plexiglass and tempered glass are great for using in situations where you ...
Stresses of 24,000 pounds per square inch (PSI) or greater will fracture it. ·
Objects thrown at it at speeds of 60 feet per second will also shatter it.